XF 1.5 Error when uploading image files

[e9coupe]

XF 1.5.23
Just recently started having issues when uploading files. Doesn't matter what file type or size, you get the error "There was a problem uploading your file. ". Recent server log errors below but I don't know enough about this stuff to figure it out, or if it's even related. Where do I start? Physical memory on the server goes between 40%-75% but the error occurs all the time. No one has changed anything in XF recently and the host says they've made no changes.

Request State
Stack Trace
Error Info
Zend_Db_Statement_Mysqli_Exception: Mysqli statement execute error : Prepared statement needs to be re-prepared - library/Zend/Db/Statement/Mysqli.php:214 Generated By: Unknown Account, Today at 2:48 AM
#0 /home/e9coupe/public_html/forum/library/Zend/Db/Statement.php(297): Zend_Db_Statement_Mysqli->_execute(Array) #1 /home/e9coupe/public_html/forum/library/Zend/Db/Adapter/Abstract.php(479): Zend_Db_Statement->execute(Array) #2 /home/e9coupe/public_html/forum/library/Zend/Db/Adapter/Abstract.php(574): Zend_Db_Adapter_Abstract->query('INSERT INTO `xf...', Array) #3 /home/e9coupe/public_html/forum/library/XenForo/Session.php(856): Zend_Db_Adapter_Abstract->insert('xf_session', Array) #4 /home/e9coupe/public_html/forum/library/XenForo/Session.php(575): XenForo_Session->saveSessionToSource('0bcc5c96d0d771e...', false) #5 /home/e9coupe/public_html/forum/library/XenForo/Controller.php(414): XenForo_Session->save() #6 /home/e9coupe/public_html/forum/library/XenForo/Controller.php(358): XenForo_Controller->updateSession(Object(XenForo_ControllerResponse_Redirect), 'XenForo_Control...', 'Posts') #7 /home/e9coupe/public_html/forum/library/XenForo/FrontController.php(376): XenForo_Controller->postDispatch(Object(XenForo_ControllerResponse_Redirect), 'XenForo_Control...', 'Posts') #8 /home/e9coupe/public_html/forum/library/XenForo/FrontController.php(152): XenForo_FrontController->dispatch(Object(XenForo_RouteMatch)) #9 /home/e9coupe/public_html/forum/index.php(13): XenForo_FrontController->run() #10 {main}
array(3) { ["url"] => string(52) "https://www.e9coupe.com/forum/find-new/1376677/posts" ["_GET"] => array(0) { } ["_POST"] => array(0) { } }

Request State
Stack Trace
Error Info
Zend_Db_Statement_Mysqli_Exception: Mysqli statement execute error : Prepared statement needs to be re-prepared - library/Zend/Db/Statement/Mysqli.php:214 Generated By: Unknown Account, Yesterday at 11:50 PM
#0 /home/e9coupe/public_html/forum/library/Zend/Db/Statement.php(297): Zend_Db_Statement_Mysqli->_execute(Array) #1 /home/e9coupe/public_html/forum/library/Zend/Db/Adapter/Abstract.php(479): Zend_Db_Statement->execute(Array) #2 /home/e9coupe/public_html/forum/library/Zend/Db/Adapter/Abstract.php(825): Zend_Db_Adapter_Abstract->query('\n\t\t\t\tSELECT ses...', Array) #3 /home/e9coupe/public_html/forum/library/XenForo/Session.php(792): Zend_Db_Adapter_Abstract->fetchOne('\n\t\t\t\tSELECT ses...', Array) #4 /home/e9coupe/public_html/forum/library/XenForo/Session.php(486): XenForo_Session->getSessionFromSource('a46fe8ee9cbb1a4...') #5 /home/e9coupe/public_html/forum/library/XenForo/Session.php(470): XenForo_Session->_setup('a46fe8ee9cbb1a4...', '\x90L\x17\xA3') #6 /home/e9coupe/public_html/forum/library/XenForo/Session.php(324): XenForo_Session->start() #7 /home/e9coupe/public_html/forum/library/XenForo/Session.php(257): XenForo_Session::getPublicSession(Object(Zend_Controller_Request_Http)) #8 /home/e9coupe/public_html/forum/library/XenForo/Controller.php(293): XenForo_Session::startPublicSession(Object(Zend_Controller_Request_Http)) #9 /home/e9coupe/public_html/forum/library/XenForo/Controller.php(306): XenForo_Controller->_setupSession('Index') #10 /home/e9coupe/public_html/forum/library/XenForo/FrontController.php(368): XenForo_Controller->preDispatch('Index', 'XenForo_Control...') #11 /home/e9coupe/public_html/forum/library/XenForo/FrontController.php(152): XenForo_FrontController->dispatch(Object(XenForo_RouteMatch)) #12 /home/e9coupe/public_html/forum/index.php(13): XenForo_FrontController->run() #13 {main}
array(3) { ["url"] => string(65) "https://e9coupe.com/forum/threads/thumbnails-vs-full-image.27203/" ["_GET"] => array(0) { } ["_POST"] => array(0) { } }

 

[e9coupe]

Maybe this is in the wrong forum. Move to Troubleshooting?

 

[Paul B]

It's a MySQL bug.

https://xenforo.com/community/searc...nt+needs+to+be+re-prepared&t=post&o=relevance

https://stackoverflow.com/questions...or-prepared-statement-needs-to-be-re-prepared

 

[e9coupe]

Everything I read points toward add-ons being the problem when it shows those errors. Nothing has changed on my site in a long time but the upload error just started recently with no obvious reason. If I select "Use new HTML5 uploader" I get the "There was a problem uploading your file." error. If I deselect it the standard single file upload works fine. My host also hasn't changed anything recently.

 

[e9coupe]

My support guru fixed the problem with mod_security.